上代码：
% Pole-Zero IIR filter to Lattice-ladder structure filter b = [1, 2, 2, 1]; a = [1, 13/24, 5/8, 1/3]; [K, C] = dir2ladr(b, a) % To Check [delta, n] = impseq(0, 0, 7); format long; hdirect = filter(b, a, delta) hlattice = ladrfilt(K, C, delta) [b1, a1] = ladr2dir(K, C)
运行结果：
结构图：
《DSP using MATLAB》示例Example 6.10
原文：http://www.cnblogs.com/ky027wh-sx/p/6435194.html